avg player isn't 6'1 in soccer though. Why take one segment of Soccer to compare to an Avg across all football teams? thats not how stats work
I gave you an example though, you said soccer wasn't for tall people and yet the last world cup winner was tall by your own baseline for height. Unless you were talking about NBA type of height your point doesn't really hold water because the average height of the most popular sport in the US isn't much taller than the average height in the premier league which is 5'11" - No correlation between a team's height and results, says study
Remove the QBs & Linemen from the equation and the height of NFL players is probably in lock step with Liga, Premier etc heights.